Composition for converting iron into steel.



UNITED STATES PATENT oFFIoE.

GEORGE FUNES DIEZ, OF NEW YORK, N. Y.

COMPOSITION FOR CONVERTING IRON INTO STEEL- 95o,o95. No Drawing.

To all whom it may concern:

Be it known that I, Gnonen Forms Dmz, a citizen of the United States, res1d1ng at New York, in the county of New York and State of New York, have invented a new and useful Composition for Converting Iron into Steel, of which the followmg 1s a specification.

'This invention has reference to mprovements in compositions for converting 1I'0I1 into steel.

While the present invention is of general application, it is especially valuable in connection with the process of producing steel dies set forth in Letters Patent Number 857926, granted to me on June 25, 1907' whereby the steel dies may be repro iced directly from the objects without the necessity of engraving the die. In the said Letters Patent there is described the process of depositing iron electrolytically directly upon the surface to be reproduced and then so treating the iron matrix thus. formed as toconvert it into a grade of steel best suited for producing positive impressions in the material chosen for the copies of the original. In this way the finest type of engrav- .ing may be produced'whcre faithfulness of It is possible by. the process of deposition set forth in the the copy is important.

said patent to produce a film of exceeding fineness, in fact, so fine and homogeneous in texture as to produce a deposit which from the beginning to end is white like tin-and at the same time free from corrugations or roughness or cr \;'stal structures to such an extent as to have the softness of silk to the touch. llaving obtained an iron deposit of this character, it must be converted into steel- Specification of Letters Patent.

Application filed June17, 1909. Serial No. 502,827.

Patented Feb. 22, 1910.

a paste. The several ingredients are all ground together in a mortar and the oil is added in small quantities from time to time until the desired paste is formed. A cruelble is filled with the paste and thematrix is first wet with oil and then covered with powdered charcoal until a coating is formed thereon and it is then placed in the crucible with the matrix face down after which the crucible is filled with the paste and pressed down and covered with plaster of paris or the like. The crucible is then placed in an oven and maintained at a red heat from eight I to ten hours, when the plate will be found to be convertedinto the finest steel, after which it may be tempered and is then ready for use for stamping metals and will withstand the pressure of the most powerful presses.

The use of the composition described is not confined to the conversion into steel of iron al eflocyanid in substantially the proportions ofeight parts of charcoal powder, one and three-quarters parts of steel filings, onequarter part of potassium ferrocyanid, and oil in sufficient quantity to form a paste of the said ingredients.

In testimony that I claim the foregoing as "my own, I have hereto affixed my signature in thg presence of two witnesses.

GEORGE FUNES DIEZ.

lVitnesses T. G. Nnvnnnn, Rlonu. SMrrH. 

